Piepho's from Montana & Minnesota

I am researching the PIEPHO family line and I am at a dead end.My g-grandfather was Robert Carl Piepho and my grandfather was Frederick Walsh Piepho, born in Judith Gap, Montana, lived in Minnesota and Texas for some time.Anyone having any information on either of these men or anyone related to them please contact me.I am willing to share the information that I have (as little as it may be).Thank You.